camera_set_video_property()

Configure the output properties for video recording and encoding

Synopsis:

#include <camera/camera_api.h>

camera_error_t camera_set_video_property(camera_handle_t handle,
                                         args...)

Arguments:

handle: The handle returned by a call to the camera_open() function.
args...: A series of comma-delimited property-value pairs.

Library:

libcamapi

Description:

Ensure that you call this function before you start a video encoding or recording.

For the args argument, you can provide one or more property-value pairs using camera_imgprop_t values as the name of the property and the correct type for the value such as an int or double value. The following camera_imgprop_t can be used with this function:

CAMERA_IMGPROP_WIDTH
CAMERA_IMGPROP_HEIGHT
CAMERA_IMGPROP_FRAMERATE
CAMERA_IMGPROP_ROTATION
CAMERA_IMGPROP_STABILIZATION
CAMERA_IMGPROP_VIDEOCODEC
CAMERA_IMGPROP_AUDIOCODEC

CAMERA_IMGPROP_FORMAT

Note:

CAMERA_IMGPROP_STABILIZATION may impact the field-of-view of the viewfinder. You may want to apply this setting prior to starting the viewfinder.

@note There is no type-checking performed by the compiler, therefore, you must ensure that the value you provide for each property matches the expected data type. Data type mismatches can result in undefined behavior and may cause your application to crash. You can specify multiple property-value pairs by delimiting them with a comma as follows:

camera_set_video_property( camera_handle,
                           CAMERA_IMGPROP_WIDTH, 720,
                           CAMERA_IMGPROP_HEIGHT, 1280,
                           CAMERA_IMGPROP_ROTATION, 270,
                           CAMERA_IMGPROP_FRAMERATE, (double)30.0 );

Note:

You should determine whether the CAMERA_FEATURE_PREVIEWISVIDEO property is available using the camera_has_feature() function before configuring the video output properties. If this feature is available, then the camera does not provide independent video and viewfinder image streams.

When using such a camera, the CAMERA_IMGPROP_WIDTH, CAMERA_IMGPROP_HEIGHT, CAMERA_IMGPROP_FORMAT, and CAMERA_IMGPROP_ROTATION properties must match the values supplied to the camera_set_vf_property() function. The viewfinder frame rate (the value used for the CAMERA_IMGPROP_FRAMERATE property in the camera_set_vf_property() function) must be an integer multiple of the video frame rate used in this function.

Returns:

CAMERA_EOK when the function successfully completes, otherwise another camera_error_t value that provides the reason that the call failed.